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Patented Oct, 4,1881.

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i UNITED STATEs PATENT ()FFICE.

ROBERT .K. BOYLE, OF NEW YORK, N. Y., ASSIGNOR T JOSIAH O. REIFF,

OF SAME PLACE.

QUADRUPLEX TELEGRAPH.

SPECIFICATION formingpart of LettersPatent No. 247,880, dated October 4,1881. Application filed January 3,1881. (NomodeL) To all whom it mayconcern:

Be it known that I, ROBERT K. BOYLE, a subject of the Queen of GreatBritain, residing at New York, in the county and Stateof New York, haveinvented new and useful Improvements in Quadruplex Telegraphs, of whichthe following is a specification.

This invention consists in certain'novel combinations of parts,hereinafter fully described, and pointed out in the claims. v

My intention is illustrated in the accompanying drawings, in whichFigure 1 represents a diagram of two terminal stations of atelegraph-line with their connections and appurtenances constructedaccording to my system, showing the key A opened. Figs. 2, 3, and 4 aredetails, which will be referred to as the description progresses. I Fig.5 is a diagram similar to that represented by Fig. 1, showingthe keys Aand '0 open. Fig. 6 is a similar diagram, showing the keys A and D open.Fig. 7 is a similar diagram, showing the keys A and B open. Figs. 8, 9,and 10 are details, which will be referred to as the description progresses. T

The two terminal stations, one of which 1 have designated New York andthe other Boston, are situated in an unbroken t'elegraph-line, which,when all the keys are closed,

commences at the New York endand-passes from the earth throughwire 10 toand through relays Q R, thence through wire 11, key A, wire 12, key B,and linewire 13, to Boston; then through key 0, wire 14, key D, wire 15,to and 5 through relays S T, and finally through wire 16 to earth. 7

Each of the terminal stations contains two batteries, those in the NewYork station being designated by letters E and F and those in 0 theBoston station by letters G and H The positive pole of the battery E(New York station) connects by wire 17 with the key A, and the negativepole of said battery connects, through the helix of a relay, E, and wire18,

with a metal plate, a, which, when the key A is closed, is in metalliccontact withthe screw a, extending through said key. The wire 18.

is also connected with the Wire 11, and the wire 17 with wire 12, whichform part of the line, as already stated. The battery F (New Yorkstation) is connected to the key B in a similar manner to that in whichthe battery E is connected to the key A, with this difference, however,that the negative pole of the battery F 'connects by wire 19 with thekey B, and the positive pole of said battery connects, through the helixofa relay, F, and wire 20, with a metal plate, 12, which, when the keyis closed, is in metallic contact with a screw, 1), extending throughthe key B. The wire 19 connects also with the linewire 13, and the wire20 with wire 12, which forms part of the line.

The connections of the batteries Gr and H in the Boston station, withtheir keys and with the line, arelike those of the batteries E and F inthe New York station, those of the battery (l being effected throughwire 21, relay G, wire 22, metal plate 0, and screw 0, and those of thebattery H being made through wire 23, relay 11, wire 24:, metal plated,'and screw 01, as will be readily understood from the severaldiagrams. If all the keys are closed, allthe batteries areshort-circuited, the

current from battery E, for instance, passing through Wire 17, key A,screw a, wire 18, and relay E, back to the battery. Consequently neitherof the batteries is on the line and no work is done. But it New Yorksends a message from key A, or, in other words, if key A is open, asshown in Fig. 1, the screw a is out of contact with the plate a, theshort. circuit of battery E is broken, and the current flows from thisbattery through wires 17 12, key B, line-wire 13, key 0, wire 14,key-D,wire 15, relays S T, and wire 16, to earth, through earth to wire 10,relays Q R, wires 11 and 18, and relay E, back to the battery, asindicated by full arrows marked A.

The relays Q R S T are provided with polarized armatures Q, R S T,respectively, the poles of the armature Q being placed inreversedposition from the poles of the armature R, and the poles of thearmature S in a reversed position from those of the armature T, 5

as indicated by the letters a s on the ends of said arniatures. When nocurrent passes through theliue and through the relaysQR S T, which formpart of the line, all the polarized armatnres are attracted by the coresof the relays, so that they rest against their back stops, q r s t,respectively; but if a current is passed through the line from battery Eas above described, the armature R of relay 1% is repulsed and drivenagainst its front stop, 9 while the armature Q of relay Q is held upmore firmly against its back stop. As soon as the armature It comes incontact with its front stop, T2, the circuit of the local battery Zthrough the sounder Z would be closed as follows: From the armature Bextends a wire, 25, to the back stop, i, of the armature I of the relayE, and this armature is connected by wires 26 and 27 with the helix ofthe sounder Z, and through this helix and wire 28 with one pole of thelocal battery Z*, the other pole of which connects by wire 29 with thefront stop, T The closing of this circuit, however, is preventedbythefollowing means: The armature I of the relay E is subjected to theaction of a spring, 6", and also of an arm, M, which is acted on by aspring, m, that has a tendency to throw said arm against the stop m. Ifthe battery E is short-circuited, so that its full force is thrown onthe relay E, the attractive force of the relay overcomes the force ofboth the springs m and i and the armature I is held in contact with itsback stop, 1', as shown in Fig. 2; but if the key A is depressed and thebattery E is thrown on the line the force of said battery on the relay Eis reduced in proportion to the increased resistance ofi'ered bytheline, and the springs 1n and i draw the armature I away from its backstop, throwing the same in the position shown in Figs. 1 and 3, wherethe spring M is held down against its stop m, while the armature I isnot in contact with either of its stops. The circuit of the localbattery Z through the sounder Z is not closed, and the depression of thekey A produces no effect on either of the soundersin the home station.The same effect takes place when either of the other keys is depressedthat is to say, the sounders can notbe operated by the keys in the homestations. At the same time,whenthekeyAis pressed down or opened apositive current flows from battery E through the line to the Bostonstation, and through the relays S T and wire 15 to the earth, as alreadystated, and shown by the full arrows marked A in Fig. 1. By this currentthe -polarized armature S of relay S is repelled against its front stop,8 while the armature T of relay T is more firmly held up against itsback stop, t. As the armature S comes in contact with its front stop, 8a circuit is closed through the sounder Y, as follows: from the armatureS, through wire 30, back stop, l, of armature L, over said armature L,wires 31 and 33, helix of sounder Y, and wire 33, to one pole of thelocal battery Y*, and from the other pole of this battery, by wire 34,

to the front stop, .9 as shown by dotted arrows marked A in Fig. 1. Inthe same manner, if the keyBin the NewYork station is depressed oropened, the sounder Y in the home station is cut out by the balancedarmature J of the relay F, while the circuit of the local battery Z isclosed through the sounder Z" in the Boston station by thepolarized'armature T being thrown in contact with its front stop, t, asfollows: from the armature T, through wire 35, stop 1, wire 36, stop It,armature K, wires 37 and 31, helix ofsounder and wire 38, to one pole ofbattery Z, the other pole of which connects by wire 39 with the frontstop, 15

From this description it will be understood that messages can betransmitted simultaneously by means of both keys A B in the New Yorkstation, the key A producing signals by the sounder Y and the keyB bythe sounder Z in the Boston station, as will be hereinafter more fullyexplained. 1f the key 0 in the Boston station should be open while thekey Ain the New York station is operating, as shown in Fig. 5, thepositive current, which passes from battery E over the line whenever thekey Ais depressed, meets a positive current thrown on the line frombattery G, the force of the relays E and G is neutralized, thethree-stop armatures I and K are thrown against their front stops, i andk, (which position is shown in Fig. 5, and also in Fig. 4,) thepolarized armatures Q and S of relays Q, and S are repelled, andthelocal battery Y* is closed on sounder Y in New York and the localbattery Y on sounder Y in Boston, as follows: from polarized armature Q,(New York station,) through wire 40, stop 2', armature 1, wire 26, helixof sounder Y, and wire 41, to one pole ofbatiery Y*, the other pole ofsaid battery being connected to front stop, g of the polarized armatureQ by wire 42; and from polarized armature S, (Boston station,) wires 30and 43, to front stop, 7c, of armature K, through this armature, wires37 '31 32, helix of sounder Y, and wire 33, to one pole of battery Y,the other pole of this battery being connected by wire 34 with the frontstop, 8 of the polarized armature S. The difierent circuits in thisfigure are shown by full arrows and by dotted arrows, markedrespectively A A and G 0 the full arrows indicatin g the line-circuitsand the dotted arrows the local circuits in the stations.

If key D in Boston station should be open while the key A in New Yorkstation is being operated, (see Fig. 6,) the positive current frombattery 15*, which passes over the line whenever the key Ais depressed,meets a negative current from the battery H both currents combine, so asto increase the force, the armaturesland L are attracted withfnllforceagainst their back stops,i and 1, respectively, (see Figs. 6and 2,) the polarized armatures R and S are repelled against their frontstops, r and 8, respectively, and the circuits from the local batteriesY and Z" are closed through the sounders Y and Z, as follows: Thecircuit through the sounder Y passes from the polarized armature S,through wire 30, stop I, armature L, wires 31 32, helix of sounderY,wire 33, to one pole of battery Y, and from the other pole of thisbattery, through wire 34, to front stop, 8 which at that moment is incontact with armature S. The circuit through the sounder Z passes fromthe polarized armature R, wire 25, stop 6, armature I, wires 26 and 27,helix of sounder Z, and Wire 28, to one pole of battery Z*, and from theother pole of this battery, through wire 29, to the front stop, r whichat that moment is in contact with armature It.

The different circuits are indicated in Fig. 6the line-circuits by fullarrows A and D D and the local circuits by dotted arrows marked A and Drespectivel y.

If the key 0 in Boston station is'depiessed while key B in New Yorkstation is being operated, the negative current from battery F which isthrown on the line whenever the key B is depressed, is opposite to thatof battery G which is thrown on the line whenever the key 0 isdepressed, the armaturesJand K are attracted against their back stops,jand it, respectively, the polarized arinatures Q and T are repelledagainst their front stops, g and t respectively, andthe circuits of'thelocal batteries Y* and Z through the sounders Y and Z are closed, asfollows: The circuit through the sounder Y passes from the armature Q,wire 40, stopj, armature J, wires 44 26, helix of sounder Y, and wire41, to one pole of battery Y*, the other pole of which connects by wire42 with the stop g which at that moment is in contact with the armatureQ. The circuit through. the sounder Z passes from the armature T,through wires 35 36, stop'k, armature K, wires 37 31, helix of sounderZ, and wire 38, to one pole of battery Z, and from the other pole ofthis battery, through wire 39, to stop 25*, which at that moment is incontact with armature T. If the key D in Boston station is depressedwhile key B in New York "station is being operated, the currents frombatteries I and B will neutralize each other, the armatures J and Lfallon their front stops, j and Z, respectively, the polarized armatures Rand T are repelled against their front stops, r and t respectively, andthe circuits of the local batteries Z and Z* are closed through thesounders Z and Z, respectively, as follows: .The circuit through thesounder Z passes from the armature B, through wire 25, stopj, armatureJ, wires 44 26 27, helix ot' sounder Z, and wire 28, to one pole ofbattery Z, and from the other pole of this battery, wire 29, to the stop1, which at that moment is in contact with the armature R. The circuitthrough the sounder Z passes from the armature T, through wire 35,stopl, armature L, Wire 31, helix of sounder Z, and wire 38, to one poleof battery Z, and from the other pole of this battery, through wire 39,to stop it, which at If both keys in either station are depressed at thesame moment, a local circnit will .be closed by the following means:Each of'the keys A B O D is provided with an insulated tail-spring, b 0(1 respectively, and when the keys are depressed these tail-springs comein contact with buttons a b c d. The button a connects by a wire, 45,through the helix of an electro-magnet. E, and a wire, 46, with theoutside stop, c of the armature e of said electro-magnet. The insidestop, 0, of this armature connects by a wire, 47, with the key B,

and through itwith the line-wire 13. Between the stops e e is anintermediate stop, 6', which connects by-a wire, 48, with the line-wire11.

A light spring, a", bears against the intermediate stop, 6 The armaturee connects by a wire, 49, with the key A, and throughit with theline-wire 12 and with wire 17, and by a wire, 50, with the insulatedtail-spring b of the key B. The battery E connects at one pole, by awire,51, with the insulated tail-spring a of key A, and atits oppositepole, b a, wire, 52, with the button I).

. It both keys A and B are open at the same moment, as shown in Fig. '7,the circnitof the battery E is closed through the electromagnet E, asfollows: from battery E through wire 51, tail-spring a, button a wire45, helix ot'electro-ma net E wire 46 sto )0 armature 6, wire 50,tail-spring 1) button I), and wire 52, back to the battery E thearmature e is attracted toward its inside stop, a, andv as it e fallsback against its outside stop, 6 the circuit through electro-magnet E isagain closed, and thus the armature e is caused to vibrate rapidlybetween its two stops, 0 6 At the moment the armature e leaves itsoutside stop, and when it touches the spring 0 (which position is shownin Fig. 9 and indicated by a stroke and dotted line in Fig. 7,) thebattery E is put on a loop-circuit through wires 17 49, armature a,spring 6 intermediate stop, 6, wires 48, 11, and 18, back to thebattery, as indicated by stroke-and-dot arrows-in Fig. 7. The battery Fis thrown on the line as follows: Its negative pole is connected to theline-wire 13, and its positive pole connects, by wires 20 12 49,armature 6*, spring 0 stop e and wire 48, with the line-wire 11, asindicated by full arrows B in Fig. 7, the polarized armature T ofelectro-magnet T (Boston station) is repelled, and the circuit ofbattery Z in Boston station is closed through sounder Z, as follows:from said battery, through wire 39, stop 1 armature T, wires 35 and 36,to stop It, armature K, wires 37 31, helix of sounder Z, and wire 38,back to the batter as indicated in dotted .arrows B in Fig. 7, therebygiving a signal in the Boston station corresponding to the movementot'the key B in the New York station. When the armature e" reaches'itsinside stop, e', as shown in Fig. 10 and indicated in dotted line inFig. 7, the battery F of key B is placed on a loop-circuit, as follows:from said battery, through wires 12 49, armature a, stop a, and wires 4719, back to the battery, as indicated by unlettered dotted arrows inFig. 7; and the battery E ofkey A is thrown on the line, as follows:from this battery, through wires 17 49, armature 0, stop 0, wire 47, toline 13, and through line 11 and Wire 18 back to the battery, asindicated in full arrows A in Fig. 7, the polarized armature S ofelectromagnet S (Boston station) is repelled, and the circuit of batteryY through sounder Y is closed, as follows: from the battery, throughwire 34, a 1'5. atu re S, wire 30, armature L, wires 31 32, sounder Y,and wire 33, back to the battery, as indicated by dotted arrows A inFig. 7, thereby giving a signal in the Boston station corresponding tothe movement of the key A in the New York station.

If both keys, (1 D, in Boston station are depressed at the same moment,the local battery G electro-magnet G, and armature y will produceexactly the same efiectas that described in the preceding paragraph-thatis to say, by the vibration of the armature between the stops 9electrical impulses will be thrown in the line-wire from one of theline-batteries G H", while at the same time the other of the saidbatteries is in a loop-circuit.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination, in a telegraph-line, of two or more keys, one ormore in each station, a battery and a relay foreach key, a three-stoparmature for each of said relays, one or more batteries and one or moresounders (corresponding in numbers to the keys) in each station, andrelays situated in and forming part of the line, and provided withpolarized armatures, which, together with the three-stop armatures andthe keys, control the circuits of the local batteries through thesounders, substantially in the manner shown and described.

2. The combination, with the keys A B and their batteries E F ofinsulated tail-springs a If, a local battery, B, an electro-magnet, E,an armature, c", and suitable connections, such as shown, with the localbattery and with the line-wire, for throwing alternating impulses fromthe batteries E F on the line, when both keys are depressed at the samemoment, substantially as described.

3. The combination, substantially as hereinbefore described, of fourkeys, two in each station, a loop-circuit containing a battery and theentire helix of a relay for each key, four additional polarized relaysnormally in the main-line circuit, one for each key, local batteries,sounders, and connections, and a linewire connecting the two stations,as and for the purpose specified.

In testimony whereof I have hereunto set my hand and seal in thepresence of two subscribing witnesses.

ROBERT KIRK BOYLE. [L. s.]

Witnesses:

J. HERMANN WAHLERs, E. F. KASTENHUBER.

